In that situation, a wage freeze, whether voluntary or imposed by the government, deals with a ________ of inflation rather than with inflation itself.[ ]

A．symbol  

B．sign

C．signal  

D．symptom

酸性磷酸酶（ACP）及其同工酶测定主要用于诊断（）。

A.肝癌

B.胃癌

C.前列腺癌

D.脑癌

E.肾癌